Finding the Fourth Proportional to 2,087.46, 2,880.81 and 1,191.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.46 : 2,880.81 = 1,191.47 : x
2. Step 2: Convert to fraction form
   2,087.46/2,880.81 = 1,191.47/x
3. Step 3: Cross multiply
   2,087.46x = 2,880.81 × 1,191.47
4. Step 4: Simplify right side
   2,087.46x = 3,432,384.29
5. Step 5: Solve for x
   x = 3,432,384.29/2,087.46
6. Step 6: Final answer
   x = 1,644.29